Of the following, which form a neutral solution? Assume all acids and bases are combined in stoichiometrically equivalent amounts.?

Question

1. HCN(aq)+KOH(aq)⇌KCN(aq)+H2O(l)

2. NH3(aq)+HCl(aq)⇌NH4Cl(aq)

3. HBr(aq)+KOH(aq)⇌KBr(aq)+H2O(l)

4. HClO4(aq)+LiOH(aq)⇌LiClO4(aq)+H2O(l)

Answer 1

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3. HBr(aq)+KOH(aq)⇌KBr(aq)+H2O(l)

and

4. HClO4(aq)+LiOH(aq)⇌LiClO4(aq)+H2O(l)